Julian is currently very fascinated with motorcycles. He would always want to have a closer look at the motorcycle whenever he sees one. He is especially fascinated with the bikes which have a carrier on the pillion seat, the kind with two 'sticks' by the side.
He even associates the rider with the items carried. There's roti-man (the man selling bread on the bike), tin-man, box-man, etc (when he sees a rider carrying tins, boxes, etc.) So, what if the rider isn't carrying anything on the carrier? Well, that's the... nothing-man!